Go is a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.

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4
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35 views

Graph (adjacency list) for BFS and DFS in Golang

I am trying to implement a Graph data structure in Golang and choose to use adjacency list representation. When starting to implement adjacency list, I have an idea ...
3
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48 views

Channels vs. “for loop” prime number generator

I've found a question on SO (here), which is a prime number generator that uses channels. First of all, I had some trouble to find out how this code works, but later on, I saw the fun of it. Then, all ...
4
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0answers
37 views

Reading OS X file tags

I'm investigating Go for use in our internal network / office project management system, and need a way to check and edit the color tags that you can set in Finder on files or folders (extended ...
4
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0answers
47 views

Equivalent binary trees (structure & values)

I am following the Golang tour and I have been asked to build a couple of functions to manipulate binary trees. My code runs as expected, but I would like to know if I could further improve my code. ...
3
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2answers
50 views

Go string formatting

I'm very new to Go, and am trying to get some experience by re-writing some of my Python code in Go. Below is a function that takes an IP address (ipv4) in integer form and returns the string ...
5
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58 views

Is my spin-lock implementation correct?

I'm working on a project where a spinlock is more appropriate than a mutex, and after few tries I came up with: ...
3
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2answers
58 views

in_array() in Go

This function's objective is very simple. It takes array and checks if val is a value inside of this array. It returns whether ...
2
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1answer
46 views

Deferred log file close

My code works in that it compiles, and when executed writes out a log file using a buffered writer. But I wonder whether: I am correct in assuming that this actually winds up deferring a ...
1
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1answer
41 views

Securely shuffling an array with 75 numbers in Go

I have a SHA512 hex string consisting of my random input and that of the user. Since rand.Seed only accepts a int64 I can never ...
6
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2answers
87 views

Is this a good way of managing parallel go routines when I care about ordering of results?

I have a process with a number of stages that need to be completed in sequence. Each stage is largely parallelisable, involving looping over a large data structure and processing each item ...
3
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1answer
37 views

File-based Equation Evaluation in Go

My program 'Monkey', written in Go, can take a file like this: + 9 13 / 10 2 And prints the output (in the case for the 'file' above, '22' and '5'.) Variables ...
3
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2answers
76 views

Implementation of merge sort and bubble sort

I'm new to Go and looking for a review of my merge sort and bubble sort implementations. What can be done better? Can my code be cleaner/clearer? ...
2
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2answers
74 views

Two-dimensional array allocation in Go

I am creating a two-dimensional array, which I am going to process later in ways similar to image MinFilter, procedural labyrinth generation, etc. -- implying using coordinates and neighbors. Here ...
3
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0answers
75 views

Concurrent download in Go

I wrote a program for downloading files in concurrent / parallel (GOMAXPROCS > 1) manner. This is my 2nd (non-toy) program written in Go. Please point out areas for improvement: ...
3
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0answers
46 views

Most intuitive way to register “commands” in an extensible IRC bot in Go

I'm writing an IRC bot as a toy project, and one of the goals is to be easy and straight-forward to implement and register new commands. As I'm new to Go, I don't know which would be the "Go way" for ...
4
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1answer
60 views

Number formatting

As part of a simple (naive) internationalization attempt in Go, I am trying to come up with a number formatting routine with customizable decimal and thousands separator. Is this approach alright? ...
3
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0answers
44 views

Does this go raytracing program follow best practices, and typical project layout?

I'm working through learning Go, so as an exercise, I'm writing a simple raytracer. I'd like general feedback on the code style & architecture. Specific areas of concern: Is the project layout ...
5
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1answer
88 views

Four algorithms to find the Nth Fibonacci number

I'm implementing some basic algorithms in Go as an introductory exercise. Here are four different algorithms to find the Nth Fibonacci number. I'm looking for general feedback, but I'm specially ...
3
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0answers
78 views

Parsing an infix notation expression and converting to reverse polish notation

I'm pretty new to Go, and I do not know the best or idiomatic ways to do most of the stuff, so I'd appreciate feedback on how to make my code better, faster or more idiomatic. My program is a set of ...
4
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3answers
105 views

Wrote a package in Go. What did I do wrong? What did I do right?

I wrote a Player package in Go. It builds correctly, but I would love a review on what I did and did not do "the Go way". I'm new to coding in the language, although I've gotten about halfway through ...
2
votes
1answer
53 views

Make logparser faster

I'm learning go. I wrote a simple logparser for SLF4J in Python some time ago and tried to port it to go as an exercise. The algorithm is identical, but the go-solution isn't quite as fast (the Python ...
0
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0answers
62 views

Iterative DFS algorithm

I've written an iterative version for DFS. For a quick overview of the benchmark results for a complete graph: So it looks like it behaves within the boundaries of the theoretical complexity. ...
3
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0answers
67 views

Queue with “unlimited” buffer in Go

This is small piece of bigger puzzle, but usable by its own. It an attempt to have a nonblocking queue with "unlimited" (besides memory size) buffer length. Got unit-tests 100% statement coverage, it ...
1
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1answer
81 views

Shuffling an array of cards

I have a deck of flashcards that I want to shuffle. Here's the method I'm using to shuffle them: ...
3
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2answers
203 views

Am I writing good Go here? Python functions converted to Go

I originally asked this question on StackOverflow. Reproduced here by recommendation. I've got a number of Python scripts that I'm considering converting to Go. I'm seeking confirmation that I'm ...
1
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1answer
99 views

Approximating square root (loops and functions exercise)

Just looking for some feedback on my solution for Tour of Go Exercise 24 - Loops and Functions. Is there anything that looks like a wrong way to do things in go? anything I could have done better? ...
3
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1answer
137 views

Web Crawler (A Tour of Go #71)

So I was trying to do this exercise from Tour of Go. I managed to get it working. I am not at all sure that it is correctly concurrent or idiomatic (I started learning Go, like, 4 hours ago). I would ...
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2answers
137 views

A Tour of Go, problem #56 - error handling

New to Go, trying to solve Tour of Go, Exercise 56, which is about error handling. Can the following error handling method can be further improved? ...
10
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3answers
779 views

golang channel in C#

I have tried to mimic golang channels in C#; and it's performance is pretty good compared to golang itself. On may machine, each channel operation of golang takes ~75 nano-sec and each ...
2
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1answer
266 views

RC4 implementation in Go

I'm new to Go, and as a learning project I've been implementing RC4, attempting to follow pseudo-code in the Wikipedia links (and trying not to look at the far-superior version in the crypto package). ...
3
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3answers
142 views

Is this idiomatic Go code?

Would the following be considered idiomatic Go code? My main concerns are: The use of maps for this purpose. I basically want the data structure to be completely dynamic in size and have easy ...
2
votes
1answer
910 views

Fibonacci generator with golang

This is my fibonacci generator: package main import "fmt" func main() { for i, j := 0, 1; j < 100; i, j = i+j,i { fmt.Println(i) } } It's ...
1
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2answers
224 views

Split and word count in go

Could it be written better? ...
0
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1answer
209 views

Using Barrier to Implement Go's Wait Group

I have implemented a WaitGroup class to simulate WaitGroup in Go lang. Then I've found that I can use Barrier in a different manner, to achieve the same thing. My WaitGroup has some additional ...
4
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1answer
87 views

Sleepsort in Go

I implemented sleepsort in Go. I am new to channels, and I'd like to get some advice on them, especially on how to close channels after N messages have been sent on them. Currently I use a counter and ...
1
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1answer
55 views

Pad a function with random bytes

I'm writing a function to append 5-10 bytes (count is random) at the beginning of a byte array, and 5-10 random bytes at the end. Here's the code I have so far. ...
2
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0answers
68 views

Stream-chaining

My goal is to have a reusable pattern for doing concurrent stream-processing in Go. The stream has to be closable from any node. Errors should cleanly close the stream and forward the error to the ...
2
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2answers
514 views

String converting and parsing a few rows of a .csv file

There are not many available resources for refactoring go code. I'm a novice gopher who would appreciate any feedback on a small program which reads a .csv file, string converts and parses a few rows ...
0
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1answer
111 views

Project Euler 10: Summation of primes in Go

Here is my first try at Google's Go language, trying to solve Project Euler Problem 10: The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below two million. ...
2
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2answers
156 views

exercise #40 in A Tour of Go

My quick searching did not reveal anyone sharing their solution to this exercise, so am not sure if there are other (and better) approaches to mine: ...
2
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1answer
791 views

Am I using Golang concurrency correctly to increase reliability?

This code takes text from the standard input, maps it to a struct (if possible), and creates a JSON string from that. I'm using a barcode scanner for the input, and I've attempted to use goroutines ...
5
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2answers
629 views

Golang solution to Project Euler #81 (min path through a matrix)

Project Euler problem 81 asks: In the 5 by 5 matrix below, ...
4
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1answer
309 views

My first Go program: Caesar Cipher

I'm learning Go at this moment and it is my first program in Go, so I will be thankfull for any suggestion, remarks and observations. ...
6
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169 views

Concurrency limit map in Go

Please someone who knows locks, mutexes, and Go, review the following code. Task: per host concurrency limits for web crawler (map[string]Semaphore). I considered chan struct{} (chan bool) approach, ...
4
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2answers
2k views

Effectively convert little endian byte slice to int32

I have a data stream of bytes and I'd like to get a little endian encoded int32 from four bytes. Is there a better way than to do this like the following code? ...
8
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1answer
118 views

Creating random maze in Go

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7
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3answers
829 views

Rot13 Reader in Go

For this exercise I have done this: ...
1
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1answer
109 views

Comparing two images

I have some code in Go that is attempting to compare two images and determine how different they are. The method is fairly crude, but it is fast enough. Basically it just compares both images pixel by ...
2
votes
2answers
299 views

code review for count then sort problems (go lang)

the question is simple, for a input [apple, banana, orange, apple, banana, apple], the program will count it as a map: {apple : 3, orange: 1, banana: 2}, then sort this map by it's values, get ...